The attached shows what I believe is WR for my OPT.
I ran my variac at 60hz into the primary until I measured 1v on the secondary.
On the 8Ω terminal I had 19.14 volts on the plate side
For giggles, on the 4Ω terminal I took two measurements... Im unsure of which way was the right way. As they are darn close I cant even guess at the correct method. The 1st method for the 4 ohm tap, I kept the same 19.14 on the primary, and measured the 4Ω at .718V. Then 2nd, I ran the variac up until the 4 ohm had 1V, on the primary was 25.8
The attached is a screen shot of my excel sheet...
Does it look like Im on the right track ?
Which reflected impedance would be the one someone would design around ?
(8Ω @ 2560 or 4Ω @ 2842 ??)
I ran my variac at 60hz into the primary until I measured 1v on the secondary.
On the 8Ω terminal I had 19.14 volts on the plate side
For giggles, on the 4Ω terminal I took two measurements... Im unsure of which way was the right way. As they are darn close I cant even guess at the correct method. The 1st method for the 4 ohm tap, I kept the same 19.14 on the primary, and measured the 4Ω at .718V. Then 2nd, I ran the variac up until the 4 ohm had 1V, on the primary was 25.8
The attached is a screen shot of my excel sheet...
Does it look like Im on the right track ?
Which reflected impedance would be the one someone would design around ?
(8Ω @ 2560 or 4Ω @ 2842 ??)
Attachments
It's 2.5k to speaker.
The voltage ratio from 4 to 8 should be 1.414. You may have 1.500, and that may be designer's choice. Having full layers for a solid winding is more important than a few percent of ratio.
The voltage ratio from 4 to 8 should be 1.414. You may have 1.500, and that may be designer's choice. Having full layers for a solid winding is more important than a few percent of ratio.
The method should be correct but 2K6 is low for usual tubes , I hope you didn't use any load on the secondary , just the meter 😀
And the result should be spot on in both ways , 1V on the secondary or 19,14V on primary .
And the result should be spot on in both ways , 1V on the secondary or 19,14V on primary .
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